mc9sdz60: driver added

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/i2c/Kconfig

@@ -10,4 +10,7 @@ config DRIVER_I2C_IMX
 config DRIVER_I2C_MC13892
 	bool "MC13892 a.k.a. PMIC driver"
 
+config DRIVER_I2C_MC9SDZ60
+	bool "MC9SDZ60 driver"
+
 endif

drivers/i2c/Makefile

@@ -3,3 +3,4 @@ obj-$(CONFIG_I2C) += i2c.o
 obj-$(CONFIG_DRIVER_I2C_IMX) += i2c-imx.o
 
 obj-$(CONFIG_DRIVER_I2C_MC13892) += mc13892.o
+obj-$(CONFIG_DRIVER_I2C_MC9SDZ60) += mc9sdz60.o

drivers/i2c/mc9sdz60.c

@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2007 Sascha Hauer, Pengutronix
+ *               2009 Marc Kleine-Budde <mkl@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <xfuncs.h>
+#include <errno.h>
+
+#include <i2c/i2c.h>
+
+#include <asm/byteorder.h>
+
+#define DRIVERNAME		"mc9sdz60"
+
+struct mc_priv {
+	struct cdev		cdev;
+	struct i2c_client	*client;
+};
+
+#define to_mc_priv(a)		container_of(a, struct mc_priv, cdev)
+
+static struct mc_priv *mc_dev;
+
+struct i2c_client *mc9sdz60_get_client(void)
+{
+	if (!mc_dev)
+		return NULL;
+
+	return mc_dev->client;
+}
+
+static u32 mc_read_reg(struct mc_priv *mc, int reg)
+{
+	u8 buf;
+
+	i2c_read_reg(mc->client, reg, &buf, sizeof(buf));
+
+	return buf;
+}
+
+static ssize_t mc_read(struct cdev *cdev, void *_buf, size_t count, ulong offset, ulong flags)
+{
+	struct mc_priv *priv = to_mc_priv(cdev);
+	int i = count;
+	u8 *buf = _buf;
+
+	while (i) {
+		*buf = mc_read_reg(priv, offset);
+		buf++;
+		i--;
+		offset++;
+	}
+
+	return count;
+}
+
+static struct file_operations mc_fops = {
+	.lseek	= dev_lseek_default,
+	.read	= mc_read,
+};
+
+static int mc_probe(struct device_d *dev)
+{
+	if (mc_dev)
+		return -EBUSY;
+
+	mc_dev = xzalloc(sizeof(struct mc_priv));
+	mc_dev->cdev.name = DRIVERNAME;
+	mc_dev->client = to_i2c_client(dev);
+	mc_dev->cdev.size = 256;
+	mc_dev->cdev.dev = dev;
+	mc_dev->cdev.ops = &mc_fops;
+
+	devfs_create(&mc_dev->cdev);
+
+	return 0;
+}
+
+static struct driver_d mc_driver = {
+	.name  = DRIVERNAME,
+	.probe = mc_probe,
+};
+
+static int mc_init(void)
+{
+        register_driver(&mc_driver);
+        return 0;
+}
+
+device_initcall(mc_init);

include/i2c/mc9sdz60.h

@@ -0,0 +1,7 @@
+#ifndef __ASM_ARCH_MC9SDZ60_H
+#define __ASM_ARCH_MC9SDZ60_H
+
+extern struct i2c_client *mc9sdz60_get_client(void);
+
+#endif /* __ASM_ARCH_MC9SDZ60_H */
+